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| 100 | _aSexena M K | ||
| 245 | _aBiosphere as an ecosystem | ||
| 260 |
_aNew Delhi _bAlp books _c2013 |
||
| 650 |
_aGeographical science _aBiological science _aBiogeography _aClassification of biosphere _aPlant and vegetation |
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| 942 | _cBK | ||
| 999 |
_c199058 _d199058 |
||